Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Michael Halcrow |
114 |
43.02% |
5 |
22.73% |
| Al Viro |
97 |
36.60% |
6 |
27.27% |
| Tyler Hicks |
22 |
8.30% |
2 |
9.09% |
| Nicholas Piggin |
8 |
3.02% |
1 |
4.55% |
| David Howells |
8 |
3.02% |
1 |
4.55% |
| Miklos Szeredi |
7 |
2.64% |
2 |
9.09% |
| Josef 'Jeff' Sipek |
4 |
1.51% |
1 |
4.55% |
| Linus Torvalds (pre-git) |
2 |
0.75% |
1 |
4.55% |
| Thomas Gleixner |
1 |
0.38% |
1 |
4.55% |
| Linus Torvalds |
1 |
0.38% |
1 |
4.55% |
| Lee Jones |
1 |
0.38% |
1 |
4.55% |
| Total |
265 |
|
22 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* eCryptfs: Linux filesystem encryption layer
*
* Copyright (C) 1997-2003 Erez Zadok
* Copyright (C) 2001-2003 Stony Brook University
* Copyright (C) 2004-2006 International Business Machines Corp.
* Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
*/
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/fs_stack.h>
#include <linux/slab.h>
#include "ecryptfs_kernel.h"
/**
* ecryptfs_d_revalidate - revalidate an ecryptfs dentry
* @dir: inode of expected parent
* @name: expected name
* @dentry: dentry to revalidate
* @flags: lookup flags
*
* Called when the VFS needs to revalidate a dentry. This
* is called whenever a name lookup finds a dentry in the
* dcache. Most filesystems leave this as NULL, because all their
* dentries in the dcache are valid.
*
* Returns 1 if valid, 0 otherwise.
*
*/
static int ecryptfs_d_revalidate(struct inode *dir, const struct qstr *name,
struct dentry *dentry, unsigned int flags)
{
struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
int rc = 1;
if (flags & LOOKUP_RCU)
return -ECHILD;
if (lower_dentry->d_flags & DCACHE_OP_REVALIDATE) {
struct inode *lower_dir = ecryptfs_inode_to_lower(dir);
struct name_snapshot n;
take_dentry_name_snapshot(&n, lower_dentry);
rc = lower_dentry->d_op->d_revalidate(lower_dir, &n.name,
lower_dentry, flags);
release_dentry_name_snapshot(&n);
}
if (d_really_is_positive(dentry)) {
struct inode *inode = d_inode(dentry);
fsstack_copy_attr_all(inode, ecryptfs_inode_to_lower(inode));
if (!inode->i_nlink)
return 0;
}
return rc;
}
struct kmem_cache *ecryptfs_dentry_info_cache;
static void ecryptfs_dentry_free_rcu(struct rcu_head *head)
{
kmem_cache_free(ecryptfs_dentry_info_cache,
container_of(head, struct ecryptfs_dentry_info, rcu));
}
/**
* ecryptfs_d_release
* @dentry: The ecryptfs dentry
*
* Called when a dentry is really deallocated.
*/
static void ecryptfs_d_release(struct dentry *dentry)
{
struct ecryptfs_dentry_info *p = dentry->d_fsdata;
if (p) {
path_put(&p->lower_path);
call_rcu(&p->rcu, ecryptfs_dentry_free_rcu);
}
}
const struct dentry_operations ecryptfs_dops = {
.d_revalidate = ecryptfs_d_revalidate,
.d_release = ecryptfs_d_release,
};